小白课代表

class Question:
    def __init__(self, text, answer=None):
        self.text = text
        self.answer = answer

class QARoom:
    def __init__(self):
        self.questions = []

    def add_question(self, question):
        self.questions.append(question)

    def answer_question(self, question_text, answer):
        for q in self.questions:
            if q.text == question_text:
                q.answer = answer
                return True
        return False

    def display_questions(self):
        for q in self.questions:
            print(f"Question: {q.text}\nAnswer: {q.answer or 'No answer yet'}\n")

# 使用示例
qa_room = QARoom()
qa_room.add_question(Question("什么是小白课代表？"))
qa_room.answer_question("什么是小白课代表？", "小白课代表是帮助同学理解和掌握课程内容的学生。")
qa_room.display_questions()